Adjustable-stroke press.



w. KLOCK I-Z. ADJUSTABLE STROKE PRESS. APPLICATION FILED FEB. 10, 1917.

1,258,020. Patented Mai. 5, 1918.

WITNESS;

By Att0meys, J\

UNITED STATES PA ENT omen WILLIAM KLOOKE, OF BROOKLYN, NEW YORK, ASSIGNOB TO W. BLISS COMPANY, OF

' BROOKLYN, NEW YORK, A OORPOBATIOH OF WEST ADJUSTABLE-STROKE PRESS.

To all whom it may concern:

Be it known that 1, WILLIAM KLocxn, a citizen of the United States of America, residing in the borough of-Brooklyn, county of Kings, in the city and State of New York, have invented certain new and useful Improvements in Adjustable-Stroke Presses, of which the followin is a specification.

M invention re ates to a press, and is particularly adapted to a press or other machine of this type wherein rotary motion from a shaft is communicated to a longitudinally reciprocating member by means o a crank and pitman, and has for its object to provide a simple and easy adjustment of the stroke of the pitman by means of a change in its efiective or working length. To this end my invention consists in introducing between the pitman and crank an adjusting connection such as a bush1ng,.wh1ch 1s revoluble in position and is eccentric to the crank, and which, when adjusted so as to bring its eccentric portion at varying places between the pitman and crank, will thereby vary the effective length of the pitman and accordin ly will vary its stroke.

My invention a so contemplates the provision of means for holding or looking the adjusting means in adjusted pos1t1on. A desirable form in which my invention may be embodied is illustrated in the accompanying drawing, wherein,

Figure 1 illustrates an elevation, partly in section, of a portion of the upper end ofa drawing press illustrating the application of my invention;

'Fig. 2 is a detail of part of the structure shown in Fig. 1, illustrating a locking key in place;

Figs. 3, 4 and 5 are cross-sections on these respective lines of Fig. 1;

Fi 6 is a detail view of the adjusting mem er or bushing, and

Fi 7 is a detail view of the locking key, whic is shown in place in 2. 7

My invention is illustrat as applied to a simple type of press such as a drawing press, and it is extremely useful in connection with such type of machine, but its utility is not confined to a press, as it is equally available for use in any type of machine employing a crank and pltman where it is desired to vary the stroke of the pitman.

The particular type of machine in connec- Speeifleetion of Letters Iatent.

Patented Mar. 5,1918.

Application fled February 10, 1917 Serial ll'o. 147,742.

tion with which I have illustrated my invention has a driving shaft A provided with a crank B from which the rotary motion of the shaft is communicated to the longitudinally reciprocating Igitman C. The pitman has the usual head for receiving the crank l3 provided with a separable yoke D, and my invention of means for varying the stroke of the piston is located in the head and interposed between the same and the crank. As shown, theadjusting means comprise a sleeve or bushing E which is revolubly mounted'in an annular opening-in the head X, and which is perforated at F for the passage of the crank B. As will be clearly apparent rom the section Fig. 5, the center of the bushing E is eccentric to the axial center of the crank B. Therefore, when it is, desired to vary the elfective length ot the pitman C this may be accomplished by rotating the bushing E in the end X, whereby the pitman C may be'either raised or lowered on the crank, as desired.

For the purpose of holding the bushing in adjusted position, I provide the same with the axially extending flanges G, H, which are located one on each side of the said bushing and enter corresponding axially arranged channels I, J in hubs K, L on the shaft. The said flanges G, H' are respectively provided with notches or. recesses g, g g y there being as many such notches as it is desired there shall be adjustments provided for the pitman. The notches in the respective flanges are alike. Only flange G is illustrated, but flange H will have corresponding notches and the notches will be located a distance apart corresponding to the extent of adjustment desired. The notches cooperate with a key M upon a removable bracket N forthe purpose of holding the bushing E in adjusted position.

Thisis accomplished by turnin the bushing in the head X until' a pair 0 the notches appear in front or at the left, as indicated in Fig. 3, where the hubs K, L are cut away so that the flanges G, H emerge from their channels I, J. Thereupon the brackets N, i

cim ms.

e the s are provided with a series of notches {I which may be engaged by a spanner to turn the said bus-hing.

it v. be perceived that by the use of my invention the desired shortening or lengthof the stroke of the pitman may be acccmpiished in a simple and expeditious manrev it is only necessary to remove the two brackets i and then to apply a spanner to the bushing- E and turn the same the notches indicating the desired adappear at the front of the machine, and the brackets N may be rethe keys M entering these said a niacediv notches. n-he bolts 02 being then applied, the ackets be secured in position and cam be securely held relative to shaft and the pitman will freely turn thereon.

-F*: the purpose of assembling-the parts to split either the driving member a member. As illustrated, the A; at one side of the crank b s transversely on the line P,

on end of the shaft enters an at the other side of the split, chess parts are eccentrlcally located e to axis of the shaft so as to two parts to turn together. A n passes through the shaft A and e: and provides means for locking the no the shafi together. I

racket is provided with a centre screw bolt S which is screwed 1 throu-s bracket to back the same out I claim as my invention i. in a press, a crank, a pitman, an adjustahle eccentric bushin between said parts, and a lock for lockin said bushing in adjusted position fixed with relation to the crank, said lock acting to resist turnin movement of the bushing on the 'cra I equally in both directions.

2. In a press, a split shaft, a crank adjacent the split, an eccentric bushing on the crank and adjustable in position thereon and normally fixed with relation thereto.

3. Ina press, a driving member comprising a shaft having acrank thereon, a driven member comprislng a pitman having an neeaoac annular opening for said crank, and a bushing revolubly mounted in said opening and adapted to surround said crank, said bushing being eccentric to and normally fixed with relation to said crank and adjustable in position to vary the stroke of the pitman, and one of said driving and driven members I being split to assemble the parts.

ing the bushing in ad usted position, and

normally fixed with relation to said crank.

6. In a press, a shaft, a crank thereon, a pitman driven from said crank, means for adjusting the stroke of the pitman comprising a rcvoluble bushing in the pitman, and means for locking saidbushing in adjusted position comprising an annular flange in the bushing adapted to enter a corresponding groove in the shaft, said flange having notchescorresponding to the number of adjustments desired, and a. bracket detachably attached to said shaft and having a key adapted to enter a notch in the flange.

7. in a press, asplit shaft, a crank thereon adjacent said split, a pitman driven from said crank and means for adjusting the stroke of the pitman comprising a revoluble bushing in the pitman, and means for look: ing said bushing in adjusted position comprising "an annular flange in the bushing adapted to enter a corresponding groove in the shaft, said flange having notches correspdnding to the number of adjustments desired, and a bracket detachably attached to it and having key adapted to enter said shai a notch the flange.

8, in a press, a split shaft, a crank thereon adjacent said split, a pitman driven from said crank, means for adjusting the stroke of the pit-man comprising a revoluble bushing in the pitman, and means for locking sa1d bushing in adjusted position comprising an annular flange in the Bushing adapted to enter a corresponding groove in the shaft, saidflange havin notches corresponding to the number 0 adjustments desired, and a bracket detachaby attached to said shaft and having a key adapted to enter a notch in the flange, and said locking means being duplicated oneach side of said crank.

9. In a ress, a shaft, an eccentric part fixed to sa1d shaft, means for locking said eccentric Part in fixed position, and a longitudinally reciprocating part actuated thereby, said eccentric part being adjustable to vary the length of the stroke, and having its center of adjustment eccentric to the center of the shaft, and said lockin means acting to resist turning movement 0? said eccentric part equally in both directions.

10. In a press, a split shaft, an eccentric part fixed to said shaft and a longitudinally reciprocating part actuated thereby, said eccentric part being adjustable to vary the length of the stroke, and having its center of) afgcijustment eccentric to the center of the s a 11. In a press, a shaft, hubs thereon, an 4 eccentric part and interengaging means between said hubs and said eccentric part, fixing said eccentric part to said'shaft, and a longitudinally reciprocating part actuated thereby, said eccentric being adjustable to vary the, length of the stroke, and having its center of engagement eccentric to the center of the shaft.

In witness whereof, I have hereunto signed my name. 7

WILLIAM KLOCKE. Witnesses:

JOHN D. M. Turn, H. MARSHALL. 

